have we ever seen a grass cutter hit the man in the floor? I appreciate it takes away the option but it also takes a defender out of the action immediately after the kick.
But the man laying down eliminates the grass cutter from being tried. I have to imagine the analytics on it of when someone is nearly certain to shoot having your wall being able to jump to full height probably makes a significant impact on how likely it is for someone to get the ball over the wall and under the crossbar.